Leaves – Awl-shaped; about ¼-¾inch long; glaucous above; usually ternate, occur in whorls of 3, sharp-pointed, and persistent; upper surface is concave, marked with a broad, white line; underside is ...
Learn how to identify trees—in one week National Geographic's Wonder Lessons will teach you how to navigate the stars, spot cloud types, recognize common trees, and identify different kinds of rocks.
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